(a)[4]
Calculate the angle $EFA$.
(b(i))[2]
Calculate the angle $ACB$.
(b(ii))[2]
Calculate the angle $CAD$.
(b(iii))[1]
Complete the statement. The triangles $AXD$ and $BXC$ are ........................................ .
(c)[2]
Calculate the area of triangle $PYS$.
(d(i))[3]
Find $n$.
(d(ii))[2]
Find the size of one interior angle of this polygon.